An advertisement for the state fair will be painted on one of four silos along the highway into town. The silos are in the shape of cylinders. Only the lateral area of the silo will be painted, not the top and bottom. If it costs $1.20 per square foot to paint the sides of the silo, which silo will cost the least to paint? Corn Silos Silo Radius Height A 6 feet 60 feet B 8 feet 50 feet C 10 feet 34 feet D 12 feet 20 feet Recall the formula L A = 2 pi r h. Silo A Silo B Silo C Silo D